Multiple-impeller pump.



A. E. GUY. MULTIPLE IMPELLIBR PUMP.

APPLICATION FILED NOV.13, 1907.-

Patented Dec .15, 1908.

2 SHEETS-SHEET 1.

l/WE T R WITNESSES" E. GUY. MULTIPLE IMPELLER PUMP.

APPLICATION FILED NOV.13, 1907.

Patented Dec. 15,1908.

2 BHEBTSSHEBT 2.

l/VVEIVT R WITNESSES;

UNITED STATES PATENT OFFICE.

ALBERT a. GUY, OF TRENTON, NEW IERSEY, ASSIGNOR T or LAVAL STEAM TURBINE 00M i i'ANY, OF NEW YORK, N. Y., A CORPORATION or NEW JERSEY.

ton, in the county of Mercer m'rmm-mmnrm.

m covpco. F

To' an whom'it concern: p Be it known that I, ALBERT. E. GUY, a citimn of the United States, residi at Trenaii State of New Jersey, have invented a certain new and usefullmprovement in Multiple-Impeller Pumps,.of which the following is a specificatio'n.

The invention relates to multiple rotary pumps, and consists in the construction of the stationary portion of the machine where the same is cheapenetl and simplified and rendered capable of receivingyimf'pellers. of

different proportions and hence o L capacity. vAnd I do assert this invention be broadly new and ioneer in that for the I conditions of pressure.

first time intl e art o multiple rotary pump building it makes possible for manufacturers to provide themselves with .said stationary parts instand ard size and, by simply insertm in the seats therein formed, impellers of di erent proportions, to produce .pum s of different capabilities or suited to di erent In the accompanying drawi s-Figures 1, 2 and 3, represent a simple orm of my improved pump; Fig. 1, being a vertical section on the line a: m ofFig. '2; Fi 2, a vertical section on the line y y of hi 1, and Fig. 3 a section on the line 2 z of Fig. 1, the impellers being removed. Figs. 4 to 7 inclusive show a modified and commercially pref.

erable form of the pump; Fig. 4 is a planview of the stationary parts, the upper sepa rable portion and the impellers being removed; Fig. 5 is a section on the line a, b, 1:, d, of Fig. 4; the impeller being removed; 6 is a section on the line 6, f, of Fig. 7, Fig. 7 is a section on the line g, 11 of 6.

bimilar numbers and letters of reference indicate like arts.

Referring rst to the formshown in Figs.

' 1, 2 and 3, the impellers A, B, are mounted apeci' flcationof I'ntteralatent... Patented Dec. 15,1908; i Airpflufionfledlovmbot 1a, 1907. Serial 101,929. r

rotates in circular openings formed tively in the wall 3 of duct D and one wall 4: of duct G. The other impeller B is seated and rotates in circular openings formed re spectively in the wall 5 of duct E and the opposite wall 6 of duct G. The fluid entering at H passes through the three suction ducts to both inlet passages of each impeller and thence to the delivery box F'and outlet I thereof, as shown by the arrows in the .drawin s.

It wi l, of course, be understood, that the stationary portion of the machine may be made in removable sections, so as to permit of introduction of the impellers to the seats, and one way of doing this is shown'in Figs.

4, 5, .6 and 7, which illustrate also a prefer able form of the apparatus. In this form,

opposite side. The various fluid passages are curved to reduce friction and direct the flow without shock, and the middle suction duct G is cast integrally with the box F. Said box with thesuction ducts may be divided horizontally into two flanged parts, united by bolts as shown at 7, in order to permit introduction of the impellers.

Especial attention is called to the following advantages incident to the present construction. v

Inasmuch as both of the impellers dis charge directly from their peripheries into the same box and have no individual casings it is possible to change the impellers to suit varying desired capacities of the pump without in any way altering the delivery box or suction ducts. Or to put it another way the delivery box and suction ducts may be made in standard size and impellers put therein in accordance'with the requirements of the user. All that is needed is that the impeller rings shall properly fit their seats in the walls of the box and duct. The diameters or the widths of the impellers between the seated rings can be made larger or smaller, as desired, to suit conditions of low pressure and large quantity of flow, or high pressure andsmall quantity. So far as I know, therefore, thisconstruction makes it possible, for the first time in the art of multiple centrifugal pump building, for the manufacturer to keep in stock the stationary parts of the pump, and use them for producing pumps of widely diflerent capacities by inserting 1n them impellers of correspondingly different proportions. This is manifestly impracti cable where each impeller has its own casing having passages designed for that particular impeller and cooperating therewith, for then the ind'ridual casings as well as the impellers must be-changcdfor what is the same thing, for different capacities different machines must be built.

The simplicity of the present construction, its large free passages and the ease and cheapness with which it can be cast will also be apparent.

I claim:

1. A multiple impeller pump comprising in combination a plurality of double suction impellers constructed to operate in parallel, and a box having supply passages for said impellers, and having also a single discharge chamber inclosing all'of said impellers and into which they discharge directly and simultaneously, said discharge chamber having a free space beyond the peripheries of said impellers into which said impellers may discharge in a direction normal to the axis of each, said box adapted to receive interchangeably impellers of different design and different diameters to suit different conditions.

2.-A multiple impeller pump comprising in combination a plurality of double suction impellers constructed to operate in parallel, and a box having supply passages for said impellers and having also a single discharge chamber inclosing all of said impellers and into which they discharge directly and simultaneously, said discharge chamber having a free space beyond the peripheries of said impellers into which said impellers may discharge in a direction normal to the axis of each, the width of the portions of said chamber immediately beyond the peripheries of said impellers being materially greater than the peripheral width of said impellers, said box adapted to receive interchangeably impellers of ditferent design and diiferent diameters to suit different conditions,

3. A multiple impeller pump comprising in combination a plurality of doublesuction impellers constructed to operate in parallel, and a box having a single discharge chamber inclosing all of said impellers and into which. they discharge directly and simulta-' neously, said discharge chamber having. a free space beyond the peripheries of said 1111- pellers into which said impellers may discharge in a direction normal to the axis of each, said box having a supply passage projecting into said discharge chamber intermediate two impellers into connection with one intake of each, and having also other supply passages outside of said impellers and each connected to an intake of a corre sponding impeller, said box adapted to receive interchangeably impellers of different design and different diameters to suit different conditions.

In testimony whereof I have afiixed my signature, in presence of two witnesses.

ALBERT 1*; GUY.

Witnesses:

Gmrrauon T. Poa'rnu, VVM. H. SIEGMAN. 

